Mounting them onto boards is the easy part (a hot air rework station is best, but a heat gun will do in a jiffy), getting the boards made is the slightly more difficult part, getting boards designed the hard part; the datasheet doesn't exactly have a reference implementation in it. Though it does mention that the protocol is compatible with the earlier A3255, and at a glance it looks like the pinout is the same.. so odds are you wouldn't have to worry too much about the board design; existing ones should have some pointers.

Mounting them onto boards is the easy part (a hot air rework station is best, but a heat gun will do in a jiffy), getting the boards made is the slightly more difficult part, getting boards designed the hard part; the datasheet doesn't exactly have a reference implementation in it. Though it does mention that the protocol is compatible with the earlier A3255, and at a glance it looks like the pinout is the same.. so odds are you wouldn't have to worry too much about the board design; existing ones should have some pointers.

I have bought a lot things from Avalon in the past had no issues. Maybe you were bugging them so much that they messed up your order intentionally

Or maybe they lied and cheated people.

Or maybe they didn't lie and cheat anyone but due to their own circumstances whatever required them to produce the product failed and they simply neglected to inform the customer of the issue, so people jumped the gun. If YiFU was such a bad person why are is miners still selling, even his new Avalon 2's which where in a stock up to a week ago are not out of stock. Business is still moving forwards for Avalon.

Reminds me of the companies who have thousands of positive feedbacks on Ebay and a less than 50~100 negative feedbacks and hearing people say "they lied and cheated people".